tools/kvm_stat: catch curses exceptions only

The previous version was catching all exceptions, including SIGINT.
We only want to catch the curses exceptions here.
Signed-off-by: NStefan Raspl <raspl@linux.vnet.ibm.com>
Reviewed-by: NJanosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: NSascha Silbe <silbe@linux.vnet.ibm.com>
Reviewed-by: NMarc Hartmayer <mhartmay@linux.vnet.ibm.com>
Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com>

tools/kvm/kvm_stat/kvm_stat

@@ -809,7 +809,7 @@ class Tui(object):
         # return from C start_color() is ignorable.
         try:
             curses.start_color()
-        except:
+        except curses.error:
             pass
 
         # Hide cursor in extra statement as some monochrome terminals